<template>

    <div class="app-container">

        <template>

            <div class="app-container">

                <h2 style="text-align: center;">发布新课程</h2>

                <el-steps :active="3" process-status="wait" align-center style="margin-bottom: 40px;">
                    <el-step title="填写课程基本信息" />
                    <el-step title="创建课程大纲" />
                    <el-step title="发布课程" />
                </el-steps>

                <div class="ccInfo">
                    <img :src="coursePublish.cover">
                    <div class="main">
                        <h2>{{ coursePublish.title }}</h2>
                        <p class="gray"><span>共{{ coursePublish.lessonNum }}课时</span></p>
                        <p><span>所属分类：{{ coursePublish.oneSubject }} — {{ coursePublish.twoSubject }}</span>
                        </p>
                        <p>课程讲师：{{ coursePublish.teacherName }}</p>
                        <h3 class="red">￥{{ coursePublish.price }}</h3>
                    </div>
                </div>

                <div>
                    <el-button @click="previous">返回修改</el-button>
                    <el-button :disabled="saveBtnDisabled" type="primary" @click="publish">发布课程</el-button>
                </div>
            </div>
        </template>

    </div>
</template>
  
<script>
import course from '@/api/edu/course'

export default {
    data() {
        return {
            saveBtnDisabled: false, // 保存按钮是否禁用
            courseId: '',//课程id
            coursePublish: {
                id: '',
                title: '',
                cover: '',
                lessonNum: 0,
                oneSubject: '',
                twoSubject: '',
                teacherName: '',
                price: '',
                description: ''
            },
        }
    },

    created() {
        // 得到url里面的courseId;
        if (this.$route.params && this.$route.params.id) {
            this.courseId = this.$route.params.id;
        }
        this.getPublishCourseInfo();
    },

    methods: {
        // 点击返回修改按钮执行这个方法
        previous() {
            console.log('previous')
            this.$router.push({ path: '/course/chapter/' + this.courseId })
        },
        // 点击发布课程按钮执行这个方法
        publish() {
            this.$confirm('此操作将发布课程, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {
                // 执行.then说明需要删除，后面执行删除代码
                course.publishCourse(this.courseId).then(response => {
                    // 提示信息
                    this.$message({
                        type: 'success',
                        message: '课程发布成功!'
                    });
                    this.$router.push({ path: '/course/list' })
                })
            })
        },
        // 刷新页面的方法，也就是展示课程最终的发布信息的方法
        getPublishCourseInfo() {
            course.getPublishCourseInfo(this.courseId).then(response => {
                this.coursePublish = response.data.coursePublishVo;
            })
        },
    }
}
</script>

<style scoped>
.ccInfo {
    background: #f5f5f5;
    padding: 20px;
    overflow: hidden;
    border: 1px dashed #DDD;
    margin-bottom: 40px;
    position: relative;
}

.ccInfo img {
    background: #d6d6d6;
    width: 500px;
    height: 278px;
    display: block;
    float: left;
    border: none;
}

.ccInfo .main {
    margin-left: 520px;
}

.ccInfo .main h2 {
    font-size: 28px;
    margin-bottom: 30px;
    line-height: 1;
    font-weight: normal;
}

.ccInfo .main p {
    margin-bottom: 10px;
    word-wrap: break-word;
    line-height: 24px;
    max-height: 48px;
    overflow: hidden;
}

.ccInfo .main p {
    margin-bottom: 10px;
    word-wrap: break-word;
    line-height: 24px;
    max-height: 48px;
    overflow: hidden;
}

.ccInfo .main h3 {
    left: 540px;
    bottom: 20px;
    line-height: 1;
    font-size: 28px;
    color: #d32f24;
    font-weight: normal;
    position: absolute;
}
</style>